feat/synfutures connector

[samlior]

Before submitting this PR, please make sure:

• Your code builds clean without any errors or warnings
• You are using approved title ("feat/", "fix/", "docs/", "refactor/")

A description of the changes proposed in the pull request:

1. Add synfutures connector(AMM Perpetual)
2. Add a new optional field called fairPrice to PerpPricesResponse, represents the price of futures.
3. Add a new optional field called balance to PerpPositionResponse, represents the amount of margin.
4. Add a new optional field called liquidationPrice to PerpPositionResponse, represents the liquidation price.
5. Add blast network for ethereum

Tests performed by the developer:

• Curl tests

Tips for QA testing:

• Curl tests